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iGCSE Physics Revision Round 1

Total questions: 36

Worksheet time: 1hrs 3mins

Name
Class
Date
1.

Iodine-131 has a half life of 8.07 days. What fraction of a sample of Iodine-131 is left unchanged after 16.14 days?

a)

1/2

b)

1/4

c)

1/8

d)

1/16

2.

Finish the following alpha decay reaction:

a)
b)
c)
3.

What is the current through the battery?

a)

450 A

b)

2 A

c)

20 mA

d)

9 A

4.

If a 75 W light bulb operates at a voltage of 120 V, what is the current in the bulb?

a)

0.63 A

b)

1.6 A

c)

9.0 x 103 A

d)

1.1 x 10-4 A

5.
A car dashboard panel bulb has a resistance of 33 Ω when it is placed across a 12 V battery. What is the current through the circuit?
a)
0.36 A
b)
2.8 A
c)
3.96 A
d)
396 A
6.

Volt meters are connected in.....

a)

series

b)

parallel

7.

According to the graph how fast does the person travel in the first 5 seconds?

a)

2 m/s

b)

10 m/s

c)

12.5 m/s

d)

1 m/s

8.

Just after the parachutist jumps out of the plane (before the parachute opens). The relative forces on them are:

a)

downward weight balances the upward friction force

b)

upward friction is constant

c)

downward weight is greater that the upward friction

d)

upward friction is greater than the downward weight

9.
Pressure is measured in what units
a)
Newtons
b)
m/s
c)
Pascals
d)
Moles
10.

What types of waves transfer energy perpendicular to the direction of oscillations?

a)

Longitudinal waves

b)

Transverse waves

c)

Sound waves

d)

P-waves

11.

What is the speed of a wave that has a wavelength of 2 and a frequency of 2.5 Hz?

a)

2.5 m/s

b)

5 m/s

c)

4.5 m/s

d)

6 m/s

12.

What would be the effect on the particles if the gas is heated?

a)

They would slow down

b)

They would stop moving

c)

They would speed up

d)

There would be no effect

13.

How far does the car travel at constant speed?

a)

75 m

b)

150 m

c)

200 m

d)

250 m

14.

Calculate the mass of a object with density 2 g/cm3 and dimensions 10 cm x 5 mm x 1 m

a)

0.04 g

b)

1000 g

c)

100 g

d)

25 g

15.

Electrical current is:

a)

the flow of neutrons

b)

the flow of ions

c)

the flow of electrons

d)

the flow of charge

16.

All waves can both reflect and refract. True or False?

a)

True

b)

False

17.

As a ray light ray travels from a less dense to a more dense optical medium (e.g. air to glass)

a)

the incident ray travels straight on

b)

the incident ray bends away from the normal

c)

the incident ray travels down the normal

d)

the incident ray bends towards the normal

18.

Kinetic energy is calculated using

a)

m x g x h

b)

Force x distance

c)

1/2 mass x velocity

d)

1/2 mass x velocity x velocity

19.
The measure of cycles per second is called the ____________.
a)
period
b)
frequency
c)
wavelength
d)
velocity
20.
The SI unit used to measure the frequency of a wave is _____________.
a)
hertz
b)
seconds
c)
meters
d)
decibels
21.
The amount of time for one wave cycle to occur is called the ____________.
a)
wavelength
b)
trough
c)
period
d)
frequency
22.
A wave can bend and change speed, as it passes through a boundary from one medium to another. This is called __________.
a)
refraction
b)
reflection
c)
diffraction
d)
absorption
23.
The loudness or volume of sound is related to which wave property?
a)
wavelength
b)
frequency
c)
amplitude
d)
speed
24.

wavelength = 0.5 m

wave speed = 5 m/s

Calculate the frequency!

v = fλ

a)

5 seconds

b)

10 Hz

c)

2.5 Hz

d)

1/5 m

25.
using f = 1/T, calculate the frequency of a wave that takes 2 seconds to pass by.
a)
1/2 seconds
b)
1/2 Hz
c)
2 seconds
d)
2 Hz
26.
Which region of the electromagnetic spectrum has MORE energy than visible light?
a)
ultraviolet rays
b)
radio waves
c)
microwaves
d)
infrared radiation
27.
The Law of Reflection states that the angle of ___________ is equal to the angle of reflection.
a)
inversion
b)
refraction
c)
incidence
d)
absorption
28.
Which regions are in order of INCREASING wavelength?
a)
gamma, UV, radio
b)
x-ray, UV, gamma
c)
microwave, infrared, visible light
d)
radio, visible light, gamma
29.
The reading shown on the micrometer is:
a)
6.48 mm
b)
6.20 mm
c)
6.02 mm
d)
5.98 mm
30.
The product of mass and acceleration is
a)
net force
b)
friction 
c)
weight
d)
velocity
31.
When an unbalanced force acts straight on to an object in motion for a certain period of time
a)
it will cause a change of momentum
b)
it will stop the object
c)
it will slow the object
d)
 it will make the object move in a circle
32.
For a system to be in equilibrium the sum of the forces acting must equal zero and 
a)
clockwise moments = anticlockwise moments
b)
the sum of the velocities must equal zero
c)
the sum of the momentums must equal zero
d)
all work must be done around a pivot point
33.
The instrument pictured is used to measure
a)
electric current
b)
electric charge
c)
voltage
d)
resistance
34.
In metal circuits conventional current flows from
a)
positive to negative terminals
b)
negative to positive terminals
c)
both ways
d)
none of these
35.
RCDs or circuit breakers protect
a)
circuits from overheating and catching fire
b)
people from getting electric shocks
c)
transistors from large voltages
d)
all of these
36.
The component pictured is a _______ which allows current to flow one way, in this case to the _______.
a)
diode, left
b)
LED, right
c)
resistor, left
d)
NOT gate, left

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